#include<stdio.h>
#include<math.h>
int main()
{
	double xa, xb, xc;
	double delta;
	double x1, x2;

	xa = 1, xb = -2, xc = 1;

	delta = 1;
	delta = sqrt(delta);
	x1 = x2 =1 ;

	printf("%lf,%lf", x1, x2);
	return 0;
}
